The prehistoric landscape of what is now known as North America bore no resemblance to what we’re familiar with today. Here are eight places that preserve the remnants of that distant past.

The western frontier was a significant part of the United States Army’s military mission in the nineteenth century, which resulted in a vast array of forts throughout the west and midwest.

Perhaps we should consider looking beyond the Grand Canyon and visit one of the many other amazing canyon vistas in the Western United States.